The use of materials for applications not provided for elsewhere, e.g. sealing materials, drilling fluids.

The use of materials in general having specific properties, not provided for elsewhere, e.g. anti-static properties, anti-oxidation properties.

Materials selected for uses or applications not provided for elsewhere.

All entries in this subclass relate to specific properties (e.g. C09K 3/16 relates to materials with anti-static properties) or specific applications of materials (e.g. C09K 17/00 relates to soil-conditioning or soil-stabilizing materials), except for main group C09K 3/00 itself, which is the residual place for classifying materials with properties or applications for which no entries exist in C09K itself nor elsewhere in IPC.

References relevant to classification in this subclass

This subclass/group does not cover:

Materials or their applications or uses for which entries are available elsewhere in IPC.

Only materials for which no specific application is mentioned, for example thickeners that can be used for any composition are classified in this class .

Relationship between large subject matter areas

Compositions for which an application is mentioned i.e. an application class is available , the documents are classified in the relevant application class only , for example: thickener for food A23, for cosmetics A61, for paints C09D.

If the sealant is only claimed with regard to a specific application and if in said specific application field a class related to the chemical nature of the sealant exists the document should only be classified in the application field

for application to surfaces to minimize adherence of ice, mist or water thereto (rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J 2/30); Thawing or antifreeze materials for application to surfaces (used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K 5/00)

Definition statement

This subclass/group covers:

Compositions for non permanent treatment, with no formation of a permanent coating in order to reduce attachment of ice, mist or water to surfaces

Relationship between large subject matter areas

A permanent coating, film on a surface is classified in C09D, e.g. water based barrier cohesive film

Markush formulae or generic formulae are not classified, only concrete embodiments or examples are classified. Simple lists of known compounds (without application in an example or embodiment) are not classified.

Luminescent materials, i.e. materials emitting light after excitation by some form of energy in the form of e.g. electrical energy, chemical energy, radiation in the visible, ultraviolet, X-ray or gamma-ray range

Markush formulae or generic formulae are not classified, only concrete embodiments or examples are classified. Simple lists of known compounds (without application in an example or embodiment) are not classified.

all elements in the inorganic compounds are used to determine the position in the scheme including the doping materials (Si,Al)(O,N) SiAlON, SiN, AlN phosphors are classified under the respective subclasses dealing with silicates/aluminates (e.g.C09K 11/7721, C09K 11/7734 etc.) and additionally under C09K 11/0883, in order to classify the nitride. A silicate and aluminate is a compound containing a silicion and/or aluminium atom and an anion. Under this definition nitrides ((Si,Al)(O,N)), fluorides (e.g.K2SiF6), sulfides (e.g. BaAl2S4) are considered as silicates/aluminates.

In all other cases the last-place rule is strictly applied (no double classification in the main group and the respective sub-groups).

Markush formulae or general formulae are not classified, only concrete embodiments or examples.

Magnesium is considered as an earth alkali metal for the purpose of this classification scheme.

Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics G02F 1/00

In the subgroups C09K 19/02 to C09K 19/603, in the absence of an indication to the contrary, materials are classified in the last appropriate place. In the case of Markush formulae, the inventive idea is classified. Further, an attempt is made to classify each exemplified embodiment.

LC compounds or the LC mixtures characterised in general by the optical, electrical or physical properties of the components are classified in the subgroups C09K 19/02 to C09K 19/0283. The two-dot subgroups C09K 19/0208 to C09K 19/0283 are non-hierarchical and each embodiment or example of a LC compound or mixture should be classified and may be placed in a different subgroup.

These subgroups cover LC compounds or the LC mixtures characterised in general by the chemical structure of the liquid crystal component, mainly the specific ring or rings or ring system(s) used, as well as the linking groups between the rings.

C09K 19/52 to C09K 19/603 These subgroups cover LC mixtures characterised in general by the chemical structure of the components, which are not liquid crystals, e.g. additives.

We place the LC embodiments in groups, where we expect to retrieve them accurately and efficiently during search. When in doubt, classify! What goes under a specific group is straightforward, since the title of the group is comprehensive.

Next to the ECLA Scheme (based on the ring(s) of the LC molecules), a non-hierarchical Indexing Code has been developed to cater for cases, where a specific unit, a linking group, an end group, the positioning of a substituent, or a special bonding is the characterising part of the chemical structure of the liquid crystal component, instead of the ring or rings that constitute the LC molecule.

That means that documents in various groups may get the same Indexing Code.

characterised by optical, electrical or physical properties of the components, in general

Special rules of classification within this group

LC compounds or the LC mixtures characterised in general by the optical, electrical or physical properties of the components are classified in the subgroups C09K 19/02 to C09K 19/0283. The two-dot subgroups C09K 19/0208 to C09K 19/0283 are non-hierarchical and each embodiment or example of a LC compound or mixture should be classified and may be placed in a different subgroup.

A mixture of Cy-C2H4-Cy (C09K 19/3028) (II) and Cy-Ph-Ph (C09K 19/3003) (III) is classified in C09K 19/3001 (I). Here we stay in the common nod (I) of the hierarchical tree, from which the two nods (II) and (III) depend.

Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K 19/06 to C09K 19/40

Definition statement

This subclass/group covers:

Mixtures of liquid crystal compounds.

Mixtures containing two or more liquid crystal compounds covered individually by the same group C09K 19/04 to C09K 19/408 are classified only in that group. In other words, in C09K 19/12 for example not only compounds such as Ph-Ph, Ph-Ph-Ph, Ph-Ph-Ph-Ph etc. are classified, but also mixtures of such compounds.

Different embodiments for LC mixtures may be classified in a different group. If liquid crystal components of the mixtures classified in groups from C09K 19/42 to C09K 19/50 are of importance as such, they should also be classified according to the compounds in groups from C09K 19/04 to C09K 19/408.

Special rules of classification within this group

Here we classify mixtures of liquid crystal compounds containing compounds covered by two or more of the preceding groups C09K 19/06 through C09K 19/408 - compare the numbered sets 4 to 12 of the main subgroups. However, if all compounds of the mixture fall under the same head subgroup, the mixture is classified in that head subgroup. Some examples might clarify this:

• A mixture of Cy-Ph-Cy (C09K19/39A1) and Cy-Ph-Ph (C09K19/39A1) is classified in C09K19/39A1. Here we stay in the same nod of the hierarchical tree.

• A mixture of Cy-C2H4-Cy (C09K19/39A2) (II) and Cy-Ph-Ph (C09K19/39A1) (III) is classified in C09K19/39A (I). Here we stay in the common nod (I) of the hierarchical tree, from which the two nods (II) and (III) depend.

• A mixture of Ph-O-C2H4-Ph (C09K 19/20) and Ph-COO-Ph (C09K 19/2007) is classified in C09K 19/20. Here the common nod of the hierarchical tree, from which the two nods depend, is the first nod.

These subgroups cover LC mixtures characterised in general by the chemical structure of the components, which are not liquid crystals, e.g. additives, solvents, organic or inorganic solid particles, macromolecular compounds, dopants.

If the fire-proofing material is only claimed with regard to a particular application and if in said particular application field a class related to the chemical nature of the fireproofing material exists the document should only be classified in the application field

If no particular application of the fireproofing material is cited the document should only be classified in the appropriate C09K 21/00 group.

If the fireproofing material is claimed without particular uses the document should be classified in the appropriate C09K 21/00 group,

however

If particular applications are cited (e.g. in the description) the document should additionally be classified in the relevant application fields

and

if many different applications are cited the document should only be classified in the appropriate C09K 21/00 group.